Fix Graphql-WS errors and Improve Downloader Subscription (#634)

* Fix errors in graphql-ws

* Send download messages more often

server/src/main/kotlin/suwayomi/tachidesk/graphql/server/subscriptions/ApolloSubscriptionProtocolHandler.kt

@@ -112,7 +112,7 @@ class ApolloSubscriptionProtocolHandler(
             return subscriptionHandler.executeSubscription(request, graphQLContext)
                 .map {
                     if (it.errors?.isNotEmpty() == true) {
-                        SubscriptionOperationMessage(type = GQL_ERROR.type, id = operationMessage.id, payload = it)
+                        SubscriptionOperationMessage(type = GQL_ERROR.type, id = operationMessage.id, payload = it.errors)
                     } else {
                         SubscriptionOperationMessage(type = GQL_NEXT.type, id = operationMessage.id, payload = it)
                     }

server/src/main/kotlin/suwayomi/tachidesk/manga/impl/download/DownloadManager.kt

@@ -132,12 +132,11 @@ object DownloadManager {
     }
 
     private fun notifyAllClients(immediate: Boolean = false) {
+        scope.launch {
+            notifyFlow.emit(Unit)
+        }
         if (immediate) {
             sendStatusToAllClients()
-        } else {
-            scope.launch {
-                notifyFlow.emit(Unit)
-            }
         }
         /*if (downloadChapter != null) { TODO GRAPHQL
             downloadSubscriptionSource.publish(downloadChapter)